题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022039-32048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022039-30411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022039-87590.png)
(1) 求
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022039-99445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022039-57995.png)
(2)当x
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022040-47645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022039-99445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022040-87530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022040-93846.png)
(3)若存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022040-41963.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022040-56113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022041-90775.png)
求
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022041-65255.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022041-48814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022041-43648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022042-31814.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022042-91839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022042-76674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022042-43581.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022043-94018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022043-53119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022043-57828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022043-85935.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022044-17444.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022044-72496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022041-48814.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022044-91715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022042-31814.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022044-47216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022041-43648.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022045-98762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022045-72584.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022045-47580.png)
所以 m=0---------------1分
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022045-74353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022045-93278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022046-69629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022046-94765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022046-80868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022047-69075.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022047-52760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022047-28514.png)
任意
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022047-56605.png)
有
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022048-46607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022048-60477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022048-12718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022048-37382.png)
经讨论只能有
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022048-25733.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022049-51533.png)
(其他方法酌情给分)
点评:第三小题对学生有难度
核心考点
试题【(本小题满分12分)已知 (1) 求在上的单调区间(2)当x时,的最小值为2,求成立的的取值集合。(3)若存在实数,使得,对任意x恒成立,求的值。】;主要考察你对平面向量应用举例等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022034-65995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022035-33634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022035-10545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022035-18672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022029-38928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022030-38549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022030-76355.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022030-49806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022029-38928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022030-38549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022019-94474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022020-89652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022020-72040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022020-67174.png)
设定义在区间
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-78585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-17420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-11303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-30101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-11303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022009-10131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022009-30171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022009-39862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022009-76933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022009-17762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-94140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022009-30171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-94220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-17420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022008-78585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-15363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-24031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-15363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-15363.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-26308.png)
(2)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-33629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-15363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-15363.png)
(3)求证:函数
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022010-47478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022011-37455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022011-47403.png)
(参考数据:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022011-28421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022011-36833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022000-96000.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022001-58452.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022001-80463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022001-39138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105022001-62292.png)
A.-![]() | B.-![]() | C.![]() | D.![]() |
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